Would recommend reading some tutorials or brief basic information about your software tools before proceeding any further.
For an hour and a half, that is really hard to believe it took you that long for a piece looking like a maximum of 10 minutes. Yes, it is that bad. There's no need in going around the corner just to please your ears and not make any progress through your graphic journey. It needs basic shaping with Pen Tool over the original image.
Take
this tutorial and please follow it step by step and take your time. You will learn a lot more from it then you would on your own at the moment.
Post your next work from that tutorial and you might see some improvement if you take your time with it.